The detail they leave out is that the emerging exploits have a rather ‘Blaster’-like capability of saturating a network with traffic and other nasty behavior.

The biggest ‘at risk’ systems are laptops that come and go inside and outside internal networks and systems that VPN into locations. Firewalls are great protection against exploits getting in from the outside, but due to the ports involved, VPNs can expose servers and clients, because they need those ports available within the VPN to communicate properly.